The gaps between what our eyes take in and what is in our mind's eye provide the unifying theme in this wide-ranging volume. In his fascinating account of the many ways that our eyes, and minds, both see and fail to see, Bruno Breitmeyer moves from cataracts and color blindness through blindsight, acquired dyslexia, and visual agnosias, including fascinating cases like the woman who did not know what she was seeing was a dog until it barked. He then uses what we've learned about the limits of our sight to illustrate the limits of our ability to mentally visualize and our ability to reason, covering everything from logical fallacies to how our motives and emotions relentlessly color the way we see the world.